Whey Matrix protein powder by ISS got one thing right: the taste. In particular, the 5 lb. chocolate whey mix is as tasty as any protein powder on the market. Just the right amount of cocoa (no extra sugar) means you aren't left with a chalky taste. The ingredients in Whey Matrix are industry stand for protein blends: Isolate & Concentrate with peptides with a respectable sugar/calorie and fat count.

The bad news: Whey Matrix does NOT mix well - particularly if you're just mixing it with just water and a spoon. About 1/4 of the mix surfaces no matter how vigorously you stir! Using a blender only slightly alleviates the problem. The consistency of Whey Matrix is more like flour than a powder. It is great for sprinkling on oatmeal or mixing with pancakes (so I'm told), but if you want a quick blast of protein – be prepared to gulp down lumpy liquid. Considering that you have so many great protein powders on the market that practically dissolve and disappear when they hit liquid (Ispoure) - you'd think ISS would put a little more effort into making this protein blend more user friendly.

Overall not a terrible product and a good $ value, but with so many better protein mixes, why bother with ISS?